diff options
| author | Raymond Mao <[email protected]> | 2026-02-13 17:52:50 -0500 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2026-02-18 08:27:51 -0600 |
| commit | 41b7a09d24d878f748eba87ae85575043224148b (patch) | |
| tree | cbc5e407ee7c91d97618d1fd70b0644b6b131c8a /include | |
| parent | 23674dee60240393dd17836c05df5b4f4aa01e5c (diff) | |
smbios: add support for dynamic generation of Type 19 table
This commit implements SMBIOS Type 19 (Memory Array Mapped Address)
generation with a hybrid approach supporting both:
1. Explicit definition via Device Tree 'smbios' node:
Child node under '/smbios/smbios/memory-array-mapped-address' will be
used to populate as individual Type 19 structure directly.
- Properties follow SMBIOS field names with lowercase letters and
hyphen-separated words (e.g., 'starting-address', 'ending-address',
'partition-width', etc.).
- This method supports precise platform-defined overrides and system
descriptions.
2. Fallback to automatic DT-based discovery:
If child node under '/smbios/smbios/memory-array-mapped-address' does
not exist, the implementation will:
- Scan all top-level 'memory@' nodes to populate Type 19 structure with
inferred size and location data.
- Scan nodes named or marked as 'memory-controller' and parse
associated 'dimm@' subnodes (if present) to extract DIMM sizes and
map them accordingly.
This dual-mode support enables flexible firmware SMBIOS reporting while
aligning with spec-compliant naming and runtime-detected memory topology.
Type 19 support is under GENERATE_SMBIOS_TABLE_VERBOSE to avoid
increasing rom size for those platforms which only require basic SMBIOS
support.
Signed-off-by: Raymond Mao <[email protected]>
Tested-by: Ilias Apalodimas <[email protected]>
Diffstat (limited to 'include')
| -rw-r--r-- | include/smbios.h | 11 | ||||
| -rw-r--r-- | include/smbios_def.h | 5 |
2 files changed, 16 insertions, 0 deletions
diff --git a/include/smbios.h b/include/smbios.h index 2deafea9aa1..e4b5ff314d9 100644 --- a/include/smbios.h +++ b/include/smbios.h @@ -372,6 +372,17 @@ struct __packed smbios_type17 { char eos[SMBIOS_STRUCT_EOS_BYTES]; }; +struct __packed smbios_type19 { + struct smbios_header hdr; + u32 start_addr; + u32 end_addr; + u16 mem_array_hdl; + u8 partition_wid; + u64 ext_start_addr; + u64 ext_end_addr; + char eos[SMBIOS_STRUCT_EOS_BYTES]; +}; + struct __packed smbios_type32 { u8 type; u8 length; diff --git a/include/smbios_def.h b/include/smbios_def.h index ce913f2f32a..ae50e1a808e 100644 --- a/include/smbios_def.h +++ b/include/smbios_def.h @@ -436,4 +436,9 @@ #define SMBIOS_MD_ERRINFO_NONE 0xFFFE #define SMBIOS_MD_ERRINFO_NOERR 0xFFFF +/* Memory Array Mapped Address */ + +/* Partition Width */ +#define SMBIOS_MAMA_PW_DEF 1 /* not partitioned */ + #endif /* _SMBIOS_DEF_H_ */ |